/Engine/Source/Runtime/AssetRegistry/Public/AssetRegistry/IAssetRegistry.h
Gets a list of all paths by name that are currently cached below the passed-in base path
void GetSubPaths ( const [FName](API\Runtime\Core\UObject\FName) & InBasePath, [TArray](API\Runtime\Core\Containers\TArray)< [FName](API\Runtime\Core\UObject\FName) > & OutPathList, bool bInRecurse ) const